One can add more search engines in >Preferences>Engine Usually setting a cookie can improve to keep these selected preferences https://searx.laquadrature.net/preferences
Duckgo & Searx (Quadrature du net) both provide via Tor searx : http://searchb5a7tmimez.onion/ DuckDuckgo : http://3g2upl4pq6kufc4m.onion/
